Family: Martinus Cornelus (Martin) Jansen / Maria Anna Maass (F2277)
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 | Carl Emil Maass (1863-1941)
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 | Wilhelmina (Fien) Aalbers (1872-1923)
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 | Wilhelm Emil Hendrik Maass (1898-1979)  |
 | Gerrit Johan Maass (1899- ) |
| Karel Hendrik Maass (1902-1964) |
| Julius Antoon Maass (1901-1928) |
| Karel Hendrik Maass (1900- ) |
| Gustaaf Wilhelm Maass (1903-1904) |
| Antoon Albert Maass (1906-1910) |
| Friedrich Carl Maass (1907-1908) |
 | Anna Helena Maass (1909-1989) |
| Wilhelmina Johanna Maass (1910-1910) |
| Antoon Alphons Maass (1911-1924) |
 | Joseph Alphons Maass (1915-1979) |
 | Martinus Cornelus (Martin) Jansen (1902-1984) |
 | Maria Anna Maass (1904- )
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 | Willy Carl Johan Jansen (1941-1959) |
| Carl Ferdinand Hendrik Jansen ( -1940) |